Atomic Aquatics Safe Second Inflator User Manual download pdf (Page 5)

• Depress the lever and withdraw the tube from the case.

The balance chamber, spring and poppet will slide out of the knob side of the inlet tube. It is necessary to

slightly open up the lever legs just a bit to allow the poppet to drop free.

The orifice and wave washer can be removed by pushing wooden pencil (point end first) into the orifice

from the hose end and withdrawing them with the pencil. Don’t use hard metal tools or you may damage the

orifice edge. The orifice adjustment sleeve is not normally removed but can be by leaving the orifice in place

and using it to unscrew the sleeve until it is clear of the threads. Then you can push the sleeve out with a pencil

(eraser first) from the knob end. The o-ring on the sleeve is not a pressure seal but to provide a friction fit.

5. Lever and lever sleeve, removal/replacement

• Lever: spread one leg of the lever just enough to clear it from one side of the sleeve, then the other side.

• Don’t overspread the lever legs more than needed or you may permanently deform it.

The lever sleeve provides a low friction bearing surface for the lever and will last many thousands of cycles.

It should not be removed or replaced unless damaged or obvious wear is apparent. Do not attempt to

reuse it once removed.

• Lever sleeve: spread apart the sleeve at the open end and slip it off the tube.

• Lever sleeve-replacement: align the small tip on the inside of the collar with the small hole in the inlet tube.

The open sides of the square hole face towards the knob. Spread the sleeve enough to push it into over

the tube next to the groove it fits in. Once over the tube, slide it into the groove and make sure it snaps

fully into position.

The lever sleeve provides a low friction bearing surface for the lever and will last many thousands of cycles.

It should not be removed or replaced unless damaged or obvious wear is apparent. Do not attempt to

reuse it once removed.

6. Poppet/seat replacement

• Grasp the silicone rubber seat and pull it out of the plastic poppet.

To replace, do not use any lubricant on the new seat, just push it in completely with a slight twisting motion

until it is completely seated into the head of the poppet. There should be no gaps between the head of the

poppet and the poppet seat.

7. Replacing the poppet into the inlet tube

• Install the lever first.

• Generously lubricate the poppet o-ring, and insert it with the poppet into the second stage T-handle tool. Align

the flat side of the poppet with the flat on top of the inlet tube (lever up). Pivot the lever all the way up and

over center to the highest position, then carefully push the poppet into the inlet tube until the poppet seat

passes the legs of the lever and it snaps into place. The small tabs on the ends of the lever legs are notched at a

45 degree angle so when the lever is lifted, the poppet will slide easily into place. Withdraw the tool.

If no tool is available, insert the poppet by hand, and take care to keep it aligned during assembly. There

is only one way the poppet will fit correctly. If the poppet rotates during assembly it will not engage the lever.

Withdraw it and try again. Do not force the parts.

After the lever is in place, insert the spring and the balance chamber. Push gently on the balance chamber

with your finger and test the lever to make sure it moves the poppet. Lubricate the poppet o-ring generously.

8. Knob components

• Remove the knob assembly from the inlet tube and case (see #4)

• Using a 1/8" hex wrench, remove the knob retainer in the end of the knob.

• Screw the knob stem clockwise all the way into the adjustment sleeve.

• Slide the knob off of the stem and push it out of the adjustment sleeve.

• Unscrew the spring pad out of the stem with a 1/8" hex wrench.

ATOMIC AQUATICS FIRST AND SECOND STAGE REGULATORS MAINTENANCE PROCEDURES • 9/2003 5

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Atomic Aquatics Safe Second Inflator User Manual Page 5

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